Soldering-tool.



J. L. & O. NILSSON.

SOLDBRING TOOL.

APPLIOATION FILED JAN.13,1908,

Patented July 27. 1909.

Offa- UNITED STATES' PATENT OFFICE.-

JOHAN LUDvie NnlssoNaND OLOF eUsTAF NILSSON., or CHICAGO, ILLINOIS. f

As'oLDERm'csr-TOOL.

Application filed January 13,` 1908. Serial No. 410,582.

T o all. whom fit may concern:

Be it known that We JOHAN L. NILssoN andOLorl G. NILssoN, citizens ofthe United States,-res'iding at Chicago, in the county of Cook and Stateof Illinois, have invented certain new and usefulY 'Improvements in ing;to provide the core and coil with improved electrical contacts; tofacilitate separation of the difterentvparts of the tool; to` providemeans for lvarying the distance of the lhand-grip from *the copper tip,Or to shorten or Vlengthen the tool as'necessity may lrequire; toprovide an improved con structionV for theheel. or rear end of the coreupon which thecoil is Wound, for the purposes of securing strength andatthe same time yreducing'. someWhat thel conductivity 30.

of heat at said end; to provide means at the forward end'of the core forthe purpose of assisting in the conduction of heat from core to coppertip; to protect the resistance coil, incase it substantially air-tight,Aand adapt' it generally to be freely handled, as a separate partremoved from the tool, Without danger of injury to thecoil and to profvide other minor improvements hereinafter referred to.

lVith the above named objects in view our invention consists in thenovel construction, arrangement and combination of parts, herelinafterdescribed in detail, illustrated in the drawing and incorporated in theclaims'.

In the drawing-Figure 1 is a longitudinal section of a full size toolembodying my invention. Fig. 2 is a similar view of several of the partsseparated. Fig. 3 is an enlarged cross section taken on line 3-3 ofFig. 1. Fig. et is asimilar section taken on line #l1-.l1 of Fig. 1.Fig. 5 is a similar section taken on line 5 5 of Fig. 1. Fig. G is asection, partly broken away, taken, on line 6 6 of Fig. 1.

Referring in detail to the several views,

- Speceationof Letters Patent. I

PatentedrJuly 27', 1909.

the body of the tool comprises a tube, handle portion, or piece ofgas-piping, 2, a grip 3 slidably mounted on said tube and normallysecured thereto against movement by means of. an interiorlythreadedfcollar, or chuck, 4,-the opening of which is tapered as shown,-\vl1ich has threaded .engagement With an exteriorlyg threaded andtapered collar 5` forming a, part of the ferrule'y secured to the grip 3in any suitable manner.

lso

A steel collar 7 is mounted on the forward end' of the tube 2 and -thiscollar is secured4 ,to the rear end of a shell 8 'Within Which is what lterm a heat cartridge 9. The" latter is composed of a copper 'core v10upon Which is Wound a resistance coil 11 and theplatter is protected bya copper shell or tube 12. The forward end of the core projects beyondthe coil inthe form of a threaded nipple 13.

Upon this nipple and against the'end ofthe coil 11 is a copper ring 14.This ring together Withthe shell 12, is secured aga-inst displacement onthe core by means of a pin 15 which passes through shell 12, ring 14.and

core 10. This separate copper ring-111A is mounted on the core after thethreads 16 on its nipple have'been cut, Which enables..v the formationof threads so that they AWill eX- tend fully up to thel ring, as shown,and make it possible to screw the butt end of the soldering tip 17 upagainst the ring ,111 very closely. The butt orA rear end of the tip17:' has a threaded bore 18 which -engages the 'nipple 13 which conductsthe heat to the tip 17 through the Walls of said bore 1S While. thecopper ring 14 carries the heat of the coil and core tothe eXtreme rearend of the 'tip, Or the rim formed by the opening 18.

The outside shell 8 is not threaded-directly upon the copper tipv 17 forthe reason that. the vaCidsused in soldering eat into the copper threadsand make the joint loose, which not only makes the tip 4Wabbly andunsteady inl service, but it also admits the ,acids to the coil andcauses its destruction as Well as an insulating film between core andtip. We obviate lthis diiiiculty by placing upon the tip 17 a tightlyfitting ring 19 which 1s made of some metal upon whichv the solderingacid does not act in the above-described manner. Ironv and steel Willserve very well for, the ring 19. With said ring 19 the outside shell 8has'threaded engagement. The forward rim ofthe ringv19is beveledas`shown at 2O and the beveled portion extends slightly be loo yond thethreads on the ring so as t'o form an annular shoulder 21 against whichthe forward end ofthe shell 8 is tightly screwed. The beveled surface isprovided to shed the acid away from the joint' between the shell 8 .andthe ring 19.

Atv the rear end of the lcoil and core is aA tliimble 22 and a nipple 23all in one piece and made out of a metal whichis a relatively' poor'conductor of heat. This thimble and nipple is made out of a solid pieceor metal bored out at one end and reduced at the other, as shown.- inthe recess formed by the bore is mounted a thimble of lava 24 the inneri end of the recess in which is of less diameter than the outer end. In.the inner or reduced recess is mounted a. phosphor bronze con-- tactring 25 and in` the outer or larger portion of the recess is a similar,but largeiyring .26. Freni the former ring one ',end, 27, of

the resistance coil leads through a suitable perforation in the thiinble22. rl`he `larger ring 26 is similarly connected with thev opposite end28 of the coil.l rlhe nipple 23 is mounted in an opening 29 in the endof the core and is secured to the core by a transverse pin.30 thatpasses through bothy core and nipple.

The tube 2 is fined throughout pm of its length with a lava stick 31 inwhi'ch conducting wires l32 and 33 are embedded. The inner ends of thesewires are Hattened into contact spri'ngs v34 and 35, the former havingelectrical connection with the outer, or large,

, trodes of the handle and of the coil.

and 37 and with a longitudinal bore 42.

J ring 2G and the spring 35 having similar connection withl the innerand smaller ring 25.- These springs, as shown, are curved at theircndsso that they shall not'stub against the rims of the respective ringswhen the springs and rings are pushed into contact i' pair of wires 42and '43 lead into the'tool `through the' bore 42 and a knot 45 Yisformed in these wires to occupy the transverse bore 40, and thefree endsthereof, .labeled 4G and..

47, are engaged by the clips, or clamps, 38 and 39. The knot 45 islarger than the bore 42 and thus prevents pull upon 'the cord of wires48 from disengaging the ends 46 and 47 from the clips.

In order to exclude air, gases or va )ors -*from gaining entrance to theinterior o the tool'7 from the handle-end thereof, we pro-i videsubstantially a hermetic seal between the tube 2 and the insulation 41,which seal consists of a suitablewax ring 49 which is poured into anannular recess around the in# sulation, through a hole 50 in the tube 2while the sealing substanceis in a fluid state.V

vIf for any reason it is necessary'to pull out the-contents of the tube2 the seal 49 is liqueiied vi-r'st if its resistance is suficient tobind the parts together against separation. The other points at whichadmission of air -or fumes might be possible are the joints be. tweenthe ends of the outer sleeve 8 and the rings 19 and v7. But with theprovision of the shoulder 21 and a close fitting of the tube 8 againstsame this joint is easily made l airtight. The ring 7 is provided" witha similar annular shoulder'. 21 for the saine purpose as the shoulder2 1. As the grip 3 is made removable from and adjustableupon the tube 2and the lava and insulation inthe tube may be removed therefrom 'accesstothe inner parts may be had without having the sleeve 8 removable fromthe rear ring 7, and the general construction therefore makes itpossible to braze the' ring' 7 and sleeve 8 together, thus leaving onlythecjointbetween the tip 17 and between the sleeve or tube 2 andinsulation, to 'be guarded. vTlie latter is simply andveffectuallyaccomplished by the-niolded-in ring 49 and the'foriner by the inclinedshedding surface 20, the shoul der 21 and the close'contact niadepossible byii'he contacting surfaces of the ring 14 and tip 17 as above'set forth.

'A Workman whose duties take him from place 'to place cannot use theordinary solden ing irons in all places, because the volta-ge varies ondifferent lines. With the aid of our invention he can use the same tooleverywhere lby simply lproviding himselfl with a few varieties ofcartridges 9; that is, Y

resistance coils of .vai-ying iresistances or numbers of windings.change' the tip 17 is simply unsci'ewed from the shell andy thecartridge 9- unscrewed from the tip, a new cartridge' firmly screwed.

in ,place and the -whole inserted` in the shell 8. When the tip 17 isturned to engage the `threads on collar 119 and sleeve or shell 8 the'contacts between the'springs 34 and 35 and the phosphor bronze rings 25and 2G are established and the scraping of tl-ie rings against thesprings tends to brighten the contacting surfaces, or remove any film orcorrosion thereupon tending to interfere with electrical conductivity.The coil 11 is thoroughly protected against being bruised in 'handlingby the shell 12, audjis easily guarded against fumes by the constructionwhich provides the ring 14 at one eiid'of the 4shell and the thinible 22at the opposite end.

As shown' in Figsl and 2 theinner edge of the thimble is rabbetedvtoreceive the end of the shell 12 and the parts are driven to- Toaccomplish the gether so as to Vmake a completelyy air and fume tightcovering for the coil.

It often happens that it is desirable to vary the reach of the tool, orto vary the position of the grip with respect to the tip,

and We provide for, this variation by making the grip 3 slidably.adjustable upon the tube 2-an'd then securing it firmly by means ot' thetaper threads onthe ring nut 4 and split ring 5v forming an extension ofthe fei'rnle.

We' claim as new and desire to secure by Letters Patentl 1. Incombination, the shell 8pt-he solderin tip, the handle portion, theivi/reswithin said handle portion having their coil" contact endsprojecting/into said shell, and a coil incased by said shell, said coilbeing removably secured to said tip and having. electrodes which'automatically slip into electrical connection W'ith said' contact Vends.

'2. In combination, the shell 8, the solderinox; tip, the handleportion, the Wires Within saidy handle portion, the seal in said yhandlewhich excludes air from the coil contact ends of said wires, said coilcontact ends projecting into said shell, a coil incased bysaid shell,said coil being removably secured t0 said tip and `having its electrodesarranged to automatically contact With said coil contact ends Whenthecoil is inserted in said shell 8.

3. AIn 'a 'soldering tool, the. combination Wit-h a resistance coil,itsvcore and contact springs '3f-l and 35, of a heat transmission ring14 against vthe tip '17 a thimble 22 on the rear endV of said core andcoil, and contact rings `and 26 mounted Within said thimble 22, saidrings'being electrically separated from each other and arranged incontact WithV the Wiring in the handle, as set forth.

4. .In a soldering tool of the class described,

a heat-transmitting ring in combination With covering 19, on thejoint-endet the tip, -conthecore of the coil, said ring arranged tocontact With the butt end of the tip 17 around said core; aheat-resisting membercomprising the lava thimble 24 and the means forsupporting it upon the rear end'ot the coil and core, coil terminalsWithin saidthimble, and means for removably connecting said coil Withthe -soldering tip'and Wiring in the handle of the tool. y

5. In a. tool of the class described, a joint between the tip 17 andshell 8 including' the" 1 ring 19 interposed between said shell-and tip,said ring composed of a material adapted to withstand the action ofsoldering acids to ahigher degree than the metal in said tip.

6. The combination With the copper soldering tip and the shell 8, of theprotecting sisting ofsteel or iron and having` threaded connection withsaid shell. e

7. The combination with the copper tip 17 andthe core proyided with athreaded nipple and threaded socket oint, of the heattransmitting copperring 14- mounted on said lcore as set forth lafter formation of thethreads on the nipple, whereby said threads may be extended fully uptothe iing when 'l0 against saidl tip t0 form a closure against acidsand fumes, as and for the purpose vset fort-h. V

'9. Thel combinationpwith a tool of the class described', of a separateheat-cartridge 9, a soldering-tip 17, means for separably connectingsaid ltip and cartridge, an acidresisting ring orI band upon said tip,an

outer shell 8 having-threaded engagement lwith said ringfand means forloosely or scparably connecting said cartridge whereby its resistancecoil may receive an electric curl90 ren't through the-handle of saidtool.

10.. They combination with a.V tool of the class described', ot' a tip17, a shell 8, a sep- Iarate member consisting cfa' heat-cartridge- 9including a -resistance coil, means for-scp 95 arably connecting saidtip andcartridge, means for similarly connecting said shell -and tip,the latter means including an acidresisting ring 19 secured to the tipand having threaded-engagement. With-'said shell, the 100 contact ringsof the coil, heatinsulating sup-l ports therefor forming a, 'part ofsaidcartridge and 'consisting ofthe thimble 24 supporting' andfseparatingsaid rings electrically together'with the thimble 22 in which 105 saidthimble 24 is held.' i v 1 11. The combination with a tool of the` classdescribed of the separate heating mem- .ber 9 which consists of a corehaving aresistance co`il-wound vthereupon and a metal 1 10 shellsurroundingsaid coil, and closers for the ends of the coil and itssurrounding shell .which .consist vof connections With, respec- 1tively,tliesoldering tip 17 andthe ends of the coil." 115 12.' In a toolof the class described,/the, combination of the tube 2, the 4grip 3adjustably, secured to said tube,the lava stick 31V Within said tube,the removable seal 50 and 'insulation 49 adapted, to form an air 120tight closure for the interior of said'tube', the Wires 32 and 33having, clips 38 andt) at one end -andl projecting'contact springs 34and 35 at their opposite ends, the removable coil having contactsadaptedto enl gagesaid springs 34 and 85, the shell 8 inclosing saidcoil, the .tip 17 secured to said shell and to the core of said'shellremovably, and the means *for connecting said clips 38 and 39electrically, which means comprise 130 the wires 43 and 44 having anirremovably held knot 45Athereon and the loose ends 46 and 47 adapted toengage said clips.`

13. The combination with a toolof the' class described, of the wiresWithin the handle portion, the ends of said wires being formed into,respectively, the fiat spring" .terminals and the spring-jaw or clipter-` minals, whereby thefeed wire and coil ,terminals are removablyheld.

14. The combination with av tool of the class described, of a tubularhandle having a pair of conducting wires therein,rthe ends of whichwires are confined within the tool,"

and means for loosely'connecting said ends with thev coil terminals andthe feed wire terminals, whereby rupture ofthe wires within the handleofthetool, through twist ingor pulling. upon the feedvwires,.is obviated.

15. The combination,with a tool of the class described, of the wiresconfined within the handle of the tool, the core and coil havingterminals which loosely contact. with. one

end of each of said wires, the soldering- `head, the shell incasing saidcore, coil and part of said head for the purpose set forth, and themeans, includin the knot 45 and spring clips 38 and 39, for removablycon necting' the loose ends 4G and 47 of the feed wires 32 and 33.

1G. In `a` soldering tool, the combination with the solderinghead andhollow handle, ofa core, a coil wound upon said core, a casing loosely'containing said core and coil and also incasing a part of said head, the

' concentric terminals for the coil, the wires 'withinthe handle wh'oseends are in the form of, respectively, spring-jaws, or clips, and flatspring contacts with curved tips,

and means for fastening the ends of feed` Wires vto vthehandleindependently of the Wires Within said handle.

17. The combination with a soldering tool ofthe class described and itshollow handle, of thewires provided atytheir respective ends withspring'contacts and spring jaws adapted to receive 'the ends of feedwires, the' casing, the core and coil normally contained within'saidcasing and having the` coil terminals projecting from the endof the coreand slidable against the sides of said spring contacts, the feed wires,means f0.1` fastening said feed wires to the handle so that the ends ofsaid feed'wires'are normally free, andthe head having threadedengagement with said core and shell. .A

tube ,2, the wires p 18'. In combination, the 32V and 33, the insulationsupporting said Wires withintliehandleor tube 2, the spring contactsformed of the' ends of said wires 32 'and 33, the core 10 having .a coil11 thereupon, the terminals of said coil consisting of the rings 25 and26, the .shell 8 incasingsaid j core, the head 17 "threaded ontosaidcore,

said head having a threaded portion covered by said shell, and havingalso an annular shoulder 21 against which the end of saidv shell abuts,and the means set f orth for preventing twisting or pulling of thefeedwires out of the handle and for connecting thev ends'of the feedwires vloosely with the ends of said wires 32 and 33. i

In testimony whereof we have hereunto,

presence of two sub-

